Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps
Multi-module floating system has attracted much attention in recent years as ocean space utilization becomes more demanding. This type of structural system has potential applications in the design and construction of floating piers, floating airports and Mobile Offshore Bases (MOBs) generally consis...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-11-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/9/11/1256 |
| _version_ | 1797509814546333696 |
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| author | Mingsheng Chen Hongrui Guo Rong Wang Ran Tao Ning Cheng |
| author_facet | Mingsheng Chen Hongrui Guo Rong Wang Ran Tao Ning Cheng |
| author_sort | Mingsheng Chen |
| collection | DOAJ |
| description | Multi-module floating system has attracted much attention in recent years as ocean space utilization becomes more demanding. This type of structural system has potential applications in the design and construction of floating piers, floating airports and Mobile Offshore Bases (MOBs) generally consists of multiple modules with narrow gaps in which hydrodynamic interactions play a non-neglected role. This study considers a numerical model consisting of several rectangular modules to study the hydrodynamics and dynamics of the multi-module floating system subjected to the waves. Based on ANSYS-AQWA, both frequency-domain and time-domain simulations are performed to analyze the complex multi-body hydrodynamic interactions by introducing artificial damping on the gap surfaces. Parametric studies are carried out to investigate the effects of the gap width, shielding effects of the multi-body system, artificial damping ratio on the gap surface, and the dependency of the hydrodynamic interaction effect on wave headings is clarified. Based on the results, it is found that the numerical analysis based on the potential flow theory with artificial damping introduced can produce accurate results for the normal wave period range. In addition, the effects of artificial damping on the dynamics and connector loads are investigated by using a simplified RMFC model. For the case of adding an artificial damping ratio of 0.2, the relative heave and pitch motions are found to be reduced by 33% and 50%, respectively. In addition, the maximum cable and fender forces are found to be reduced by 50%, compared with the case without viscosity correction. |
| first_indexed | 2024-03-10T05:23:05Z |
| format | Article |
| id | doaj.art-db2cf62eb4d944a5afb2e815e3a5fa66 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T05:23:05Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-db2cf62eb4d944a5afb2e815e3a5fa662023-11-22T23:54:03ZengMDPI AGJournal of Marine Science and Engineering2077-13122021-11-01911125610.3390/jmse9111256Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow GapsMingsheng Chen0Hongrui Guo1Rong Wang2Ran Tao3Ning Cheng4Key Laboratory of High Performance Ship Technology (Wuhan University of Technology), Ministry of Education, Wuhan 430063, ChinaKey Laboratory of High Performance Ship Technology (Wuhan University of Technology), Ministry of Education, Wuhan 430063, ChinaChina Harbour Engineering Co., Ltd., Beijing 100027, ChinaChina Harbour Engineering Co., Ltd., Beijing 100027, ChinaChina Harbour Engineering Co., Ltd., Beijing 100027, ChinaMulti-module floating system has attracted much attention in recent years as ocean space utilization becomes more demanding. This type of structural system has potential applications in the design and construction of floating piers, floating airports and Mobile Offshore Bases (MOBs) generally consists of multiple modules with narrow gaps in which hydrodynamic interactions play a non-neglected role. This study considers a numerical model consisting of several rectangular modules to study the hydrodynamics and dynamics of the multi-module floating system subjected to the waves. Based on ANSYS-AQWA, both frequency-domain and time-domain simulations are performed to analyze the complex multi-body hydrodynamic interactions by introducing artificial damping on the gap surfaces. Parametric studies are carried out to investigate the effects of the gap width, shielding effects of the multi-body system, artificial damping ratio on the gap surface, and the dependency of the hydrodynamic interaction effect on wave headings is clarified. Based on the results, it is found that the numerical analysis based on the potential flow theory with artificial damping introduced can produce accurate results for the normal wave period range. In addition, the effects of artificial damping on the dynamics and connector loads are investigated by using a simplified RMFC model. For the case of adding an artificial damping ratio of 0.2, the relative heave and pitch motions are found to be reduced by 33% and 50%, respectively. In addition, the maximum cable and fender forces are found to be reduced by 50%, compared with the case without viscosity correction.https://www.mdpi.com/2077-1312/9/11/1256multi-module floating systemgap resonancehydrodynamic interactionimpulse response functionartificial dampingANSYS-AQWA |
| spellingShingle | Mingsheng Chen Hongrui Guo Rong Wang Ran Tao Ning Cheng Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps Journal of Marine Science and Engineering multi-module floating system gap resonance hydrodynamic interaction impulse response function artificial damping ANSYS-AQWA |
| title | Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps |
| title_full | Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps |
| title_fullStr | Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps |
| title_full_unstemmed | Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps |
| title_short | Effects of Gap Resonance on the Hydrodynamics and Dynamics of a Multi-Module Floating System with Narrow Gaps |
| title_sort | effects of gap resonance on the hydrodynamics and dynamics of a multi module floating system with narrow gaps |
| topic | multi-module floating system gap resonance hydrodynamic interaction impulse response function artificial damping ANSYS-AQWA |
| url | https://www.mdpi.com/2077-1312/9/11/1256 |
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